<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>BOM对象</title>
</head>
<body>
    <!-- 浏览器对象模型 BOM -->
    <!--
        1. window
             alert()
             confirm()
             prompt()
             setInterval()
             setTimeout()
        2. location
             href
             hash
             url
             ...
             reload()
        3. screen
        4. history
             go()
     -->

</body>
</html>